Golub Capital BDC Inc美股招股说明书(2026-05-20版)

GOLUB CAPITAL BDC, INC.6.250% Notes due 2031 We are offering for sale $500,000,000 in aggregate principal amount of 6.250% notes due 2031, which we refer toas the Notes. The Notes will mature on June 1, 2031. We will pay interest on the Notes semi-annually in arrears onJune 1 and December 1 of each year, beginning on December 1, 2026. We may redeem the Notes in whole or in part at any time, or from time to time, at the applicable redemption pricediscussed under the caption “Description of Notes — Optional Redemption” in this prospectus supplement. Inaddition, holders of the Notes can require us to repurchase some or all of the Notes at a purchase price equal to 100%of their principal amount, plus accrued and unpaid interest to, but not including, the repurchase date upon theoccurrence of a Change of Control Repurchase Event (as defined herein). The Notes will be issued in minimumdenominations of $2,000 and integral multiples of $1,000 in excess thereof. The Notes will be our general unsecured obligations that rank senior in right of payment to all of our futureindebtedness that is expressly subordinated in right of payment to the Notes, rankpari passuwith all existing andfuture unsecured unsubordinated indebtedness issued by us (including the 2026 Notes, the 2027 Notes, the 2028 Notesand the 2029 Notes, each as defined herein), rank effectively junior to all of our existing and future securedindebtedness (including unsecured indebtedness that we later secure) to the extent of the value of the assets securingsuch indebtedness, and rank structurally junior to all existing and future indebtedness (including trade payables)incurred by our subsidiaries, financing vehicles or similar facilities. As of May 15, 2026, we had approximately $4.6billion of debt outstanding, $2.4 billion of which was unsecured senior indebtedness (represented by the 2026 Notes,the 2027 Notes, the 2028 Notes and the 2029 Notes) that will rank equal to the Notes, approximately $1.4 billion ofwhich was indebtedness secured by substantially all of the assets of our subsidiaries and that will be structurally seniorto the Notes, and approximately $855.8 million of which was indebtedness secured by substantially all of our assetsand that will be effectively senior to the Notes. We do not presently expect to issue any subordinated debt. We are an externally managed, closed-end, non-diversified management investment company that has elected tobe regulated as a business development company under the Investment Company Act of 1940, as amended, or the 1940Act. Our investment objective is to generate current income and capital appreciation by investing primarily in one stop(a loan that combines characteristics of traditional first lien senior secured loans and second lien or subordinated loansand that are often referred to by other middle-market lenders as unitranche loans) and other senior secured loans ofU.S. middle-market companies. We also selectively invest in second lien and subordinated loans of, and warrants andminority equity securities in, U.S. middle-market companies. GC Advisors LLC serves as our investment adviser. Golub Capital LLC serves as our administrator. GC AdvisorsLLC and Golub Capital LLC are affiliated with Golub Capital (as defined herein), a leading lender to U.S. middle-market companies with over $90.0 billion in capital under management as of April 1, 2026. Investing in our securities involves a high degree of risk. Before buying any securities, you should read thediscussion of the material risks of investing in our securities, including the risk of leverage, in “Risk Factors”beginning on page S-9 of this prospectus supplement and on page 8 of the accompanying prospectus orotherwise included in or incorporated by reference herein or the accompanying prospectus and in any freewriting prospectuses we have authorized for use in connection with this offering, and under similar headings inthe other documents that are incorporated by reference into this prospectus supplement and the accompanyingprospectus. This prospectus supplement and the accompanying prospectus contain important information you should knowbefore investing in the Notes. Please read this prospectus supplement and the accompanying prospectus, and thedocuments incorporated by reference herein and therein, before you invest and keep it for future reference. We fileannual, quarterly and current reports, proxy statements and other information about us with the Securities andExchange Commission, or the SEC. We maintain a website atwww.golubcapitalbdc.comand make all of our annual,quarterly and current reports, proxy statements and other publicly filed information available on or through ourwebsite. Information on our website is not incorporated into or a part of this prospectus supplement or theaccompanying prospectus or any free writing prospectus. You can also obtain such information, free of charge, andmake inquiries by calling us collect at (212) 750-6060